there is one scientific fact. Above 7 ish degrees at night: older 3 year old car batteries used for powering one simple ac inverter, dead in the morn, even if engine-recharged half an hour. Above 7ish.. come the morn, still alive.
down to 5...just when i was ready to start the next. Best laid plans o' mice 'n men
Will have to wait
another day
Oh well...